I'm looking for simple storage, nothing fancy, but at least Firewire 400 if not 800 since USB 2.0 is so slow...

What is the best value at the moment? Buying lots of cheap 500gb drives, 1tb, 2tb?

LaCie, WD, no-name or ?

Does the cache matter for simple back-ups (I'm not running Photoshop off it).

I have 2tb x 2 right now, so I want a third drive for off-site storage.